mirror of
https://github.com/librenms/librenms-agent.git
synced 2024-05-09 09:54:52 +00:00
98 lines
3.2 KiB
Bash
Executable File
98 lines
3.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# MDADM SNMP extension for LibreNMS
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# Version
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extendVer='2.0.0'
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# Initial portion of json
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mdadmSNMPOutput='{ "data": ['
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# Outputs a list of devices
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list_devices() {
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for device in "${1}/slaves/"*; do
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if [ "${2,,}" == 'count' ]; then
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((devCount++))
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elif [ "${2,,}" != 'missing' ] || [ ! -e "${device}" ]; then
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printf '%b\t "%s"' "${multiDisk}" "$(basename "${device}")"
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multiDisk=',\n'
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fi
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done
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[ "${devCount}" ] && echo "${devCount}"
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}
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# Outputs either 0, 100, or the value of the file referenced
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maybe_get() {
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if [[ $(cat "${1}") =~ " / " ]]; then
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echo "100 * $(cat ${1})" | bc
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elif [ -f "${1}" ] && [ "$(cat "${1}")" != 'none' ]; then
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cat "${1}"
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else
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echo 0
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fi
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}
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main() {
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if ! which 'jq' > /dev/null 2>&1; then
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errorCode=1
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# The underscore here is a hack since we have to strip spaces without jq
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errorString='jq_missing!'
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elif stat "/dev/md"[[:digit:]]* > /dev/null 2>&1; then
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for mdadmArray in "/dev/md"[[:digit:]]*; do
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# Ignore partitions
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[[ "${mdadmArray}" =~ '/dev/md'[[:digit:]]+'p' ]] && continue
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mdadmName="$(basename "$(realpath "${mdadmArray}")")"
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mdadmSysDev="/sys/block/${mdadmName}"
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degraded=$(maybe_get "${mdadmSysDev}/md/degraded")
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syncSpeed=$(($(maybe_get "${mdadmSysDev}/md/sync_speed") * 1024))
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syncCompleted=$(maybe_get "${mdadmSysDev}/md/sync_completed")
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if [ $syncCompleted -eq 0 ] && [ $degraded -eq 0 ] && [ $syncSpeed -eq 0 ]; then
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syncCompleted="100"
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fi
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read -r -d '' mdadmOutput <<MDADMJSON
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${multiArray}{
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"name": "${mdadmName}",
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"level": "$(maybe_get "${mdadmSysDev}/md/level")",
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"size": $((($(maybe_get "${mdadmSysDev}/size") * 1024) / 2)),
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"disc_count": $(maybe_get "${mdadmSysDev}/md/raid_disks"),
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"hotspare_count": $((($(list_devices "${mdadmSysDev}" count "${mdadmSysDev}") - $(maybe_get "${mdadmSysDev}/md/raid_disks")))),
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"device_list": [
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$(list_devices "${mdadmSysDev}")
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],
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"missing_devices_list": [
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$(list_devices "${mdadmSysDev}" missing)
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],
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"state": "$(maybe_get "${mdadmSysDev}/md/array_state")",
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"action": "$(maybe_get "${mdadmSysDev}/md/sync_action")",
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"degraded": $degraded,
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"sync_speed": $syncSpeed,
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"sync_completed": $syncCompleted
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}
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MDADMJSON
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# Add a comma only after the first item
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multiArray=','
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mdadmSNMPOutput+="${mdadmOutput}"
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done
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else
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errorCode=2
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errorString='mdadm array not found!'
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fi
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read -r -d '' metadataOutput <<METADATA
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],
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"error": ${errorCode:-0},
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"errorString": "${errorString}",
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"version": "${extendVer}"
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}
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METADATA
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# If JQ is missing we need to echo this manually and strip whitespace
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# SC2001 is not applicable because we already use parameter expansion search/replace
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# shellcheck disable=SC2001
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jq -c '.' <<< "${mdadmSNMPOutput}${metadataOutput}" 2> /dev/null || sed 's/\s//g' <<< "${mdadmSNMPOutput//$'\n'/}${metadataOutput//$'\n'/}"
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}
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main "${@}"
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